The Richat Structure or Guelb er Richat in Mauritania was thought by many to be an impact crater until it was identified as a possible ‘salt dome’(a) . Some of the more enthusiastic supporters of the ‘Electric Universe’ school of thought have sought to identify the feature as the consequence of an electrical discharge.(e)
The concentric circles of which the structure is composed is clearly revealed by satellite imagery. However, these characteristics are not visible when walking across the structure. The consensus today is that the structure is a natural geological feature. In more technical terms a geological ‘dome’ is “A structure that plunges in all directions to form a circular or elongate structure is a dome. Domes are generally formed from one main deformation event, or via diapirism from underlying magmatic intrusions or movement of upwardly mobile, mechanically ductile material such as rock salt (salt dome) and shale (shale diapir). The Richat Structure of the Sahara is considered a dome that has been laid bare by erosion.”(k)
It did not take long before it was being compared to Plato’s description of Atlantis. However, Ulf Richter has pointed out that it is too wide (35 km), too elevated (400 metres) and too far from the sea (500 km) to be seriously considered as the location of Atlantis. Nevertheless, researchers such as Robert deMelo are still prepared consider it a possible location candidate(b) .
50 km west-southwest of Richat is a similar though smaller feature, the Semsiyat Dome, having a diameter of just 5 km.
In 2008, George Sarantitis put forward the idea that the Richat Structure was the location of Atlantis, supporting his contention with an intensive reappraisal of the translation of Plato’s text(g). His theory has been published in Greek, with an English translation now (2017) imminent.
In 2006 George S. Alexander and Natalis Rosen were struck bythe similarity of the Richat feature with Plato’s description and decided to investigate on the ground. Instability in the region prevented this until late 2008 when they visited the site, gathering material for a movie. The film was then finalised and published on their then newly established website in 2010(c).
In 2013 further support for linking Atlantis with Richat came from Jose D.C. Hernandez with a rather convoluted theory in a paper entitled A Celestial Impact and Atlantis(f).
Towards the end of the 2018 media ‘silly season’, the YouTube channel Bright Insight made a pathetic attempt to breathe new life into the Atlantis in Sahara theory. However, it fails on one simple fact; it is not submerged, but for good measure, when Alexander and Rosen investigated the Richat Structure they could not produce a single piece of physical evidence from the 35 km wide site. Where was the bustling port described by Plato. I could go on, but remember, its not called the silly season without reason.
Early November 2018 saw the British tabloid press give further coverage to Jimmy Bright’s ideas (i)(j). His theories are totally dependent on the destruction of Atlantis having occurred around twelve thousand years ago. He does not explain how an attack was launched from Mauritania on Athens which did not even exist at that time. Bright, like many others, need this very early date to explain why the Richat Structure is not under water today, but was gradually uplifted as a result of tectonic forces in the region. However, Plato clearly states that the submerged Atlantis was still a hazard to shipping in his day, a period when the Structure would have been at its present elevation. As no geologic event has occurred during the two and a half millennia since Plato, which could have raised the Structure from the seabed to an elevation of 400 metres 500 km from the Atlantic, we are obliged to give greater credence to the scientific conclusion that the Richat Structure is a natural feature.
>Steven Novella, an Atlantis sceptic, offers a highly disparaging review of Bright’s claims(l), most of which I agree with. However, I would argue with Novella’s closed-minded attitude towards the existence of Atlantis and Bright’s attention-seeking location choice for Plato’s island.<
However, in 2018, Martin K. Ettington published a booklet entitled The Real Atlantis  in which he insists that the Richat Structure is the remains of Atlantis but with no real evidence to support his contention.
In Joining the Dots  and in Atlantipedia.ie I have consistently argued that proximity is an essential logistical requirement in order to achieve a successful invasion. This was particularly true in ancient times when all empires expanded through the invasion of neighbouring territories. The Richat Structure is many thousands of kilometres from Athens, so to suggest that an attack was launched from Mauretania on Greece is simply ludicrous.
(b) http://www.gpofr.com/documents/2012Atlantis.pdf (offline October ’14)
The Cape Verde Islands are located on the continental shelf off the west coast of Africa and are a popular location for Europeans wishing to buy property in the sun. They would have been more extensive in area when the ocean levels were lower during the last Ice Age . Along with the Canaries, Azores, Madeira and some smaller North Atlantic islands they constitute ‘Macaronesia’.
When they were rediscovered in 1460 they were found to be uninhabited although they were noted as inhabited on earlier maps. The 1413 map of the Catalan cartographer Mecia de Viladestes, which is thought to be based on Roman sources, shows islands at the same location named as Gades, a name that could be a diminutive of Gorgades or possibly derived from Gaderia one of the kingdoms of the Atlantis empire. In the 16th century the Cape Verde Islands were also shown with the alternative name of Dorcades, on the 1563 map of the Portuguese historian Antonio Galvao, which may just have been a corruption of Gorgades. A few years later in 1587 a map by the English geographer Richard Haklyut again applies the name Gorgades to the Cape Verde Islands. The identification of the Gorgades with the Cape Verde Islands is strongly defended by modern writers such as Andrew Collins.
Although there is little support for identifying the Cape Verde Islands as Atlantis itself, there is willingness by some to see them as remnants of its empire. Without more clear-cut classical references and/or archaeological evidence, it would be unwise to put too much value on any Atlantean link with the archipelago.
In 1949, Capt. H.P.C. Andersen, who worked for a Danish salvage company, wrote a very brief letter to Egerton Sykes‘ Atlantis Research journal with the self-explanatory title of Atlantean Traces in the Cape Verde Islands(a). In it, he recounts coming across a harbour in Boavista Island, the bottom of which was completely covered in sheets of concrete about a yard square, reminiscent of a market place.
A short YouTube clip(b) purporting to offer evidence for Atlantis at Cape Verde is available. It is based on Google Earth images, but is far from convincing.
(a) Atlantis Research (1949. 2.1. p13)
Thorwald C. Franke was born in 1971 in Konstanz in southwest Germany. He studied computer science at the University of Karlsruhe and now works as a software developer. Since 1999 he has been promoting the idea of Atlantis having been located in Sicily. He has written a paper, which makes the case for identifying Atlas with king Italos of the Sicels, who were one of the first tribes to inhabit Sicily, and gave their name to the island.
In October 2010 Franke announced that a part of his theory has weaknesses in it that require further research(f).
He is of the opinion that the war with the Atlanteans was recorded by the Egyptians as the conflict with the Sea Peoples of whom the Sicilians are generally accepted to have been part.
Franke has a well presented website(a), in English and German, where he cogently outlines his views. He has also written a lengthy, 23-page paper on the need for a classification of Atlantis theories . Even though this item is in German, English readers may find it quite interesting using their browser’s translator. Franke has also compiled an extensive list of Atlantis related websites(d) that he expanded further in a new format in October 2011.
His paper for the 2nd Atlantis Conference in Athens in 2008 is available on the Internet(c) in which he expanded on his Sicilian location for Atlantis.
Franke has also published a book, in German that focussed on Herodotus’ contribution to the Atlantis question(p).*In the same paper, he dealt with the true meaning of the phrase in Timaeus 24e which tells us that Atlantis was ‘greater’ (meizon) than Asia and Libya combined, which he clarified as actually referring to their combined power rather than size. However, Franke proposed that the Egyptian word ‘wr’, whose primary meaning is ‘big’ and is sometimes used in a metaphorical sense, may have influenced the wording of the Greek text
He builds his case on an 1816 misinterpretation by a French mathematician, Jean Baptiste Joseph Delambre, of a 1587 commentary on Strabo’s Geographica by Isaac Casaubon. Combined with other evidence he has presented a case which removes the only prominent classical writer alleged to have apparently dismissed the existence of Atlantis. In late 2012 Franke published an English translation with the title of Aristotle and Atlantis. Franke’s views regarding Aristotle have been well received and his book frequently cited, most recently by Dhani Irwanto in his Atlantis:The Lost City is in the Java Sea[1093.110].
Franke has now augmented his book on Aristotle with a YouTube video in English(l) and German(m).
2012 also saw the publication, by Franke, of the first English translation of Gunnar Rudberg’s 1917 monograph Atlantis och Syrakusai, now Atlantis and Syracuse. This is a welcome addition to Atlantis literature in English. Students of the Atlantis mystery owe a debt of gratitude to Herr Franke.
In 2006, Franke published a paper outlining Wilhelm Brandenstein’s contribution to Atlantology which in 2013 he published in English(g). This was followed by a translation(h) of his overview of the work of Massimo Pallattino, who had adopted some of Brandenstein’s approach to the Atlantis question.
On the 30st of May 2013 Franke announced(i) that his Atlantis Newsletter, which until now was only available in German, in future will also be published in English. Today he discusses the antics of extremist Atlantis sceptics and the abuse of Wikipedia. I encourage everyone to register and congratulate Thorwald on this development.
There is also a video clip available of Franke showing his library of Atlantis related books(e). 2017 has seen Franke produce a number of 30-minute videos, which readers will find informative. They are available in both German and English, (Just Google Plato’s Atlantis – Thorwald C. Franke – YouTube).
Franke has now (July 2013) revamped his website (http://www.atlantis-scout.de/)
More recently, July 2016 saw the publication, in German, of Kritische Geschichte der Meinungen und Hypothesen zu Platons Atlantis (Critical history of the hypotheses on Plato’s Atlantis). This tome of nearly 600 pages will undoubtedly be a valuable addition to any serious researcher’s library. There is a promotional video, in German, to go with it(j). Hopefully, an English translation of the book will follow.
In June 2018, Franke published a YouTube video in English(r) and German(s) highlighting the manner in which Plato’s 9,000 years have been alternatively accepted and then rejected many times over since the time of Plato. Franke proposes that the 9,000 years recorded by Plato was comparable with the accepted age of Egypt in his day, at 11,00 years. However, archaeology has demonstrated that Egypt was only 3,000 years old or less when Plato was alive, suggesting that the 9,000 should be reduced by a comparable amount to arrive at the real time of Atlantis.
In his Newsletter No.90, Franke has highlighted that a small German right-wing group, ‘Pro Deutschland’, has cited on their website the ‘superior civilisation’ of Atlantis in support of their extremist views.
Franke’s Newsletter No. 103 has now provided us with five parallel versions of the Atlantis texts(n), Two English; Jowett & Bury and Two German; Susemihl & Müller as well as a Greek text from the Scottish classicist John Burnet (1863 – 1928).
Franke’s Newsletter No.104 offers an overview of the difficulties involved in accepting Plato’s writings too literally(o). He gives particular attention to the 9,000 years claimed to have elapsed between the Atlanean War and Solon’s visit to Egypt.
*Franke has now published two new videos(t), in both German and English, in which he reviews a number of Atlantis related books, both supportive and sceptical. He does so in his usual balanced manner and also exhorts students of Atlantology to learn German in order to have access to important works only available in that language.*
(l) https://www.youtube.com/watch?v=inWb6IVNWFQ (English)
(m) https://www.youtube.com/watch?v=qDG7a09xkZE (German)